1
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Tomczyk I, Kalek M. Electrochemical Dearomatizing Methoxylation of Phenols and Naphthols: Synthetic and Computational Studies. Chemistry 2024; 30:e202303916. [PMID: 38315289 DOI: 10.1002/chem.202303916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
The electrochemical oxidative dearomatizing methoxylation of phenols and naphthols was developed. It provides an alternative route for the preparation of methoxycyclohexadienones, important and versatile synthetic intermediates, that eliminates the need for stoichiometric high-energy chemical oxidants and generates hydrogen as a sole by-product. The reaction proceeds in a simple constant current mode, in an undivided cell, and it employs standardized instrumentation. A collection of methoxycyclohexadienones derived from various 2,4,6-tri-substituted phenols and 1-substituted-2-naphthols was obtained in moderate to excellent yields. These include a complex derivative of estrone, as well as methoxylated dearomatized 1,1'-bi-2-naphthols (BINOLs). The mechanism of the reaction was subject to profound investigations using density functional theory calculations. In particular, the reactivity of two key intermediates, phenoxyl radical and phenoxenium ion, was carefully examined. The obtained results shed light on the pathway leading to the desired product and rationalize experimentally observed selectivities regarding a side benzylic methoxylation and the preference for the functionalization at the para over the ortho position. They also uncover the structure-selectivity relationship, inversely correlating the steric bulk of the substrate with its propensity to undergo the side-reaction. Moreover, the loss of stereochemical information from enantiopure BINOL substrates during the reaction is rationalized by the computations.
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Affiliation(s)
- Ireneusz Tomczyk
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097, Warsaw, Poland
| | - Marcin Kalek
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097, Warsaw, Poland
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2
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Wang F, Xu X, Yan Y, Zhang J, Bai WJ, Chen J, Yang Y. Diastereoselective Construction of Fused Carbocyclic Pyrrolidines via a Copper-Catalyzed [3 + 2] Cycloaddition: Total Syntheses of Pancratinines B-C. Org Lett 2023; 25:6853-6857. [PMID: 37682751 DOI: 10.1021/acs.orglett.3c02310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
A Cu-catalyzed diastereoselective [3 + 2] cycloaddition of 2-arylaziridines and cyclic silyl dienol ethers was developed to efficiently construct fused-[5,n] carbocyclic pyrrolidines, which are widespread in bioactive natural products. Mechanistic studies revealed that the high diastereoselectivity of this transformation arose from a sequential retro aza-Michael/epimerization/aza-Michael process. Taking advantage of this newly developed method, the first total syntheses of pancratinines B and C were concisely realized.
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Affiliation(s)
- Fang Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Xiaohan Xu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Yangtian Yan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Jiayang Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, China
| | - Wen-Ju Bai
- Department of Chemistry, Stanford University Stanford, California 94305-5080, United States
| | - Jianwei Chen
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 518107, China
| | - Yang Yang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, China
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3
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Chen G, Shi Y, Tian W, Xie H, Yan Z, Yu J. Demethylaromatization of cyclohexadienones by iodotriphenylphosphonium iodide. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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4
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Zha Q, Wu Y. Enantioselective Total Synthesis of 10-Desoxy Analogue of a Previously Reported Natural Peroxyguaidiol. J Org Chem 2022; 87:10114-10137. [PMID: 35796860 DOI: 10.1021/acs.joc.2c01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Described herein is an enantioselective synthesis of an analogue of a previously reported guaiane endoperoxide isolated from aerial parts of Croton arboreous. The polycyclic framework of the target structure was constructed with the C-7 stereogenic center derived from L-(-)-carvone and other stereogenic centers installed via substrate chirality-induced asymmetric reactions, starting with the synthesis of the seven-membered ring through regioselective enolization of carvone, ring-expansion, and installation of a conjugated C═C bond. Further functionalization was then achieved through regioselective enolization, triflation, and installation of an isopropenyl group. During the synthesis, some exceptions to the well-known rules of "thermodynamic control" and "kinetic control" in enolization of asymmetric cyclic ketones were observed. In construction of the bridged five-membered and endoperoxy rings, a peroxycarbenium [3 + 2] cycloaddition reaction with alkenes was carried out with several alkenes-silyl-gem-dihydroperoxides of different relative configurations. However, no expected [3 + 2] products were observed. Finally, the five-membered ring was smoothly installed through an intramolecular Darzens reaction, and the peroxy functionality was introduced via a carbon-centered radical-mediated reaction with triplet oxygen, followed by an intramolecular etherification under acidic conditions. Comparison of the 1H and 13C NMR spectra of the synthetic analogue and the natural product revealed that the latter was definitely not an endoperoxide.
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Affiliation(s)
- Qinghong Zha
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yikang Wu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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5
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Man Y, Zhou C, Fu S, Liu B. Synthetic Study Aiming at the Tricyclic Core of 12- epi-JBIR-23/24. Org Lett 2021; 23:3151-3156. [PMID: 33826342 DOI: 10.1021/acs.orglett.1c00853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthetic study toward highly enantio- and diastereoselective synthesis of the tricyclic framework of 12-epi-JBIR-23/24, a natural product analogue showing inhibitory activity against four malignant pleural mesothelioma cell lines, is presented herein. In this synthesis, a rhodium-catalyzed asymmetric three-component Michael/aldol reaction introduces three consecutive tertiary carbon centers, while the unique epoxyquinol core motif is successfully forged via [3,3]-sigmatropic rearrangement of an allylic xanthate, vinylogous Pummerer rearrangement, and a selective mesylation/epoxidation cascade of a triol.
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Affiliation(s)
- Yi Man
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Chengying Zhou
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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6
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Shui F, Jia J, Yang X, Zhou Q, Jiang Y, Chen X. Synthesis of (+)-Epoxydon, (-)-Phyllostine, (-)-RKTS 33, and (-)-Parasitenone Featuring Selective Sulfonylation and Oxirane Ring Closure of Aldol Cyclization Products. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000486] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Feng Shui
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
| | - Junhao Jia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
| | - Xing Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
| | - Qin Zhou
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
| | - Yimin Jiang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
| | - Xiaochuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education; College of Chemistry; Sichuan University; 610064 Chengdu PR China
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7
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Yang X, Yuan P, Shui F, Zhou Y, Chen X. A divergent strategy to synthesize gabosines featuring a switchable two-way aldol cyclization. Org Biomol Chem 2019; 17:4061-4072. [PMID: 30951069 DOI: 10.1039/c9ob00469f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gabosines and their natural analogues, belonging to C7 carbasugars, have attracted great attention in synthesis due to their rich structural variety and promising biological activities. A new diversity-oriented approach for the gabosine-type carbasugars based on a tunable regioselective aldol cyclization of flexible precursor 2 is explored. Two cyclization modes (A and B) of the precursor can be well controlled by switching promoters to selectively produce two resulting cyclohexa(e)nones 3 and 10, both of which are versatile intermediates for various C7 carbasugars. After the conversion of 3 to eight natural carbasugars, the utility of intermediate 10 is illustrated by the first synthesis of (-)-gabosine L, as well as the new synthesis of (-)-gabosine A, (-)-gabosine B, (-)-gabosine N and (-)-gabosine O. The chemical structure and the absolute configuration of (-)-gabosine L are confirmed by its total synthesis.
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Affiliation(s)
- Xing Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China.
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8
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Nguyen LV, Beeler AB. Synthesis of Complex Stereoheptads en Route to Daphnane Diterpene Orthoesters. Org Lett 2018; 20:5177-5180. [DOI: 10.1021/acs.orglett.8b02124] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Long V. Nguyen
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Aaron B. Beeler
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
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9
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Xing JJ, Gao YN, Shi M. Phosphine-Initiated Cascade Annulation of β′-Acetoxy Allenoate and p
-Quinols: Access to Ring Fused Hexahydroindeno Furan Derivatives. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800319] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jiao-Jiao Xing
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road Shanghai 200237 People's Republic of China
| | - Yu-Ning Gao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road Shanghai 200237 People's Republic of China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road Shanghai 200237 People's Republic of China
- State Key Laboratory and Institute of Elemento-organic Chemistry; Nankai University; Tianjin 300071 People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Lu Shanghai 200032 People's Republic of China
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10
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Mehta G, Sengupta S. Progress in the total synthesis of epoxyquinone natural products: An update. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Singh P, Peddinti RK. Metal-Free Alkyl(Aryl) Transfer-Aromatization-Alkylation Domino Approach: Facile Synthesis of Branched Hydroquinones from p
-Quinols and Diaryl Carbinols. ChemistrySelect 2017. [DOI: 10.1002/slct.201700445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Pallavi Singh
- Department of Chemistry; Indian Institute of Technology Roorkee; Roorkee- 247667, Uttarakhand India
| | - Rama Krishna Peddinti
- Department of Chemistry; Indian Institute of Technology Roorkee; Roorkee- 247667, Uttarakhand India
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12
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Fu P, La S, MacMillan JB. Daryamide Analogues from a Marine-Derived Streptomyces species. JOURNAL OF NATURAL PRODUCTS 2017; 80:1096-1101. [PMID: 28225277 DOI: 10.1021/acs.jnatprod.7b00011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Three new cyclohexene amine derivatives, daryamides D-F (1-3), a new arylamine derivative, carpatamide D (4), and a new ornithine lactamization derivative, ornilactam A (5), were isolated from the marine-derived Streptomyces strain SNE-011. Their structures, including absolute configurations, were elucidated on the basis of spectroscopic analysis and chemical methods. The carpatamide skeleton could be considered as the biosynthetic precursor of the daryamides.
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Affiliation(s)
- Peng Fu
- Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas , Dallas, Texas 75390, United States
| | - Scott La
- Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas , Dallas, Texas 75390, United States
| | - John B MacMillan
- Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas , Dallas, Texas 75390, United States
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13
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Horwitz MA, Massolo E, Johnson JS. Phosphazene-catalyzed desymmetrization of cyclohexadienones by dithiane addition. Beilstein J Org Chem 2017; 13:762-767. [PMID: 28546832 PMCID: PMC5433211 DOI: 10.3762/bjoc.13.75] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 04/04/2017] [Indexed: 12/26/2022] Open
Abstract
We report a desymmetrization of cyclohexadienones by intramolecular conjugate addition of a tethered dithiane nucleophile. Mild reaction conditions allow the formation of diversely functionalized fused bicyclic lactones. The products participate in facially selective additions from the convex surface, leading to allylic alcohol derivatives.
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Affiliation(s)
- Matthew A Horwitz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA
| | - Elisabetta Massolo
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA
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14
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Abstract
The first and asymmetric total synthesis of (-)-hedycoropyrans A (1) was accomplished in 18 steps with 5.4% overall yield. The key features of our strategy include (1) construction of the unusual trans-2-aryl-6-alkyl tetrahydropyran core via Achmatowicz rearrangement, Zn-mediated reductive deoxygenation, and Heck-Matsuda coupling reaction, and (2) installation of 3,4-anti-dihydroxy from the corresponding 3,4-syn-dihydroxy THP through chemo- and regioselective IBX oxidation and Evans-Saksena reduction. In addition, C2 epimerization of (-)-hedycoropyan A (1) under the acidic condition furnished (-)-hedycoropyan B (2) with 71% yield. This finding might suggest the biogenetic origin of hedycoropyran B.
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Affiliation(s)
- Zhilong Li
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China.,HKUST Shenzhen Research Institute , Shenzhen 518057, China
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15
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García-García C, Ortiz-Rojano L, Álvarez S, Álvarez R, Ribagorda M, Carreño MC. Friedel–Crafts Alkylation of Indoles with p-Quinols: The Role of Hydrogen Bonding of Water for the Desymmetrization of the Cyclohexadienone System. Org Lett 2016; 18:2224-7. [DOI: 10.1021/acs.orglett.6b00781] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carolina García-García
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - Laura Ortiz-Rojano
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - Susana Álvarez
- Departamento
de Química Orgánica, Facultad de Química, Universidade de Vigo, CINBIO, Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - Rosana Álvarez
- Departamento
de Química Orgánica, Facultad de Química, Universidade de Vigo, CINBIO, Lagoas-Marcosende s/n, 36310 Vigo, Spain
| | - María Ribagorda
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
| | - M. Carmen Carreño
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente
n° 7, Cantoblanco, 28049 Madrid, Spain
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16
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Abstract
Cyclohexadienones are versatile platforms for performing asymmetric synthesis as evidenced by the numerous natural product syntheses that exploit their diverse reactivity profile. However, there are few general methods available for the direct asymmetric synthesis of chiral cyclohexadienones. To circumvent this problem, several researchers have developed catalytic asymmetric methods that employ readily available achiral 2,5-cyclohexadienones as substrates. Many of these reactions are desymmetrizations in which one of the enantiotopic alkenes of an achiral dienone is transformed. Others involve selective reaction at one alkene of an unsymmetrically substituted, achiral dienone. This review will cover advances in this area over the last 20 years and the application of these strategies in complex molecule synthesis.
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Affiliation(s)
- Kyle A Kalstabakken
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
| | - Andrew M Harned
- Department of Chemistry, University of Minnesota-Twin Cities, 207 Pleasant St SE, Minneapolis, Minnesota 55455, United States
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17
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García-García C, Redondo MC, Ribagorda M, Carreño MC. Reactions ofp-Quinols with Aldehydes and Imines: Stereoselective Access to Polyheterobicyclic and Tricyclic Systems. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403114] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Malak L, Ibrahim MA, Bishay D, Abdel-baky AM, Moharram AM, Tekwani B, Cutler S, Ross SA. Antileishmanial metabolites from Geosmithia langdonii. JOURNAL OF NATURAL PRODUCTS 2014; 77:1987-91. [PMID: 25084548 PMCID: PMC4176393 DOI: 10.1021/np5000473] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Indexed: 05/18/2023]
Abstract
Antileishmanial bioassay guided fractionation of Geosmithia langdonii has resulted in the isolation and identification of two new compounds (1 and 2) together with 10 known compounds (3-12). The structures of the isolated metabolites were elucidated based on comprehensive 1D and 2D NMR spectroscopic data as well as mass spectrometry. The absolute configuration at C4, C5, and C6 of 2 was determined as R using a modified Mosher esterification method and NOESY correlations. The extracts and the isolated metabolites were evaluated for their antileishmanial activities. Compounds 3, 9, 11, and 12 were found to be active against Leishmania donovani with IC50 values of 6.9, 3.3, 8.5, and 9.2 μM, respectively, while compounds 1, 5, and 10 showed lower activities against L. donovani with IC50 values of 13.0, 47.3, and 34.0 μM, respectively.
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Affiliation(s)
- Lourin
G. Malak
- National
Center for Natural Products Research, Research Institute of Pharmaceutical
Sciences, School of Pharmacy, The University
of Mississippi, University, Mississippi 38677, United States
- Pharmacognosy
Department, Faculty of Pharmacy, Assiut
University, Assiut 71526, Egypt
| | - Mohamed Ali Ibrahim
- National
Center for Natural Products Research, Research Institute of Pharmaceutical
Sciences, School of Pharmacy, The University
of Mississippi, University, Mississippi 38677, United States
- Department
of Chemistry of Natural Compounds, National
Research Center, Dokki 12622, Cairo, Egypt
| | - Daoud
W. Bishay
- Pharmacognosy
Department, Faculty of Pharmacy, Assiut
University, Assiut 71526, Egypt
| | - Afaf M. Abdel-baky
- Pharmacognosy
Department, Faculty of Pharmacy, Assiut
University, Assiut 71526, Egypt
| | - Ahmed M. Moharram
- Assiut
University Mycological Center, Assiut University, Assiut 71515, Egypt
| | - Babu Tekwani
- National
Center for Natural Products Research, Research Institute of Pharmaceutical
Sciences, School of Pharmacy, The University
of Mississippi, University, Mississippi 38677, United States
- BioMolecular
Sciences Department, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
| | - Stephen
J. Cutler
- National
Center for Natural Products Research, Research Institute of Pharmaceutical
Sciences, School of Pharmacy, The University
of Mississippi, University, Mississippi 38677, United States
- BioMolecular
Sciences Department, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
| | - Samir A. Ross
- National
Center for Natural Products Research, Research Institute of Pharmaceutical
Sciences, School of Pharmacy, The University
of Mississippi, University, Mississippi 38677, United States
- BioMolecular
Sciences Department, School of Pharmacy, University of Mississippi, University, Mississippi 38677, United States
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19
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Rynearson KD, Dutta S, Tran K, Dibrov SM, Hermann T. Synthesis of Oxazole Analogs of Streptolidine Lactam. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300943] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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20
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Meister AC, Sauter PF, Bräse S. A Stereoselective Approach to Functionalized Cyclohexenones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300752] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Babu DC, Rao CB, Venkatesham K, Selvam JJP, Venkateswarlu Y. Toward synthesis of carbasugars (+)-gabosine C, (+)-COTC, (+)-pericosine B, and (+)-pericosine C. Carbohydr Res 2013; 388:130-7. [PMID: 24637047 DOI: 10.1016/j.carres.2013.08.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/03/2013] [Accepted: 08/09/2013] [Indexed: 11/28/2022]
Abstract
Asymmetric total synthesis of (+)-gabosine C, (+)-pericosine B, and (+)-pericosine C has been reported from readily available d-(-)-isoascorbic acid and d-ribose involving Grubbs ring closing metathesis, Morita-Baylis-Hillman (MBH) reaction, and Luche reduction.
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Affiliation(s)
- D Chanti Babu
- Division of Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India.
| | - Ch Bhujanga Rao
- Division of Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - K Venkatesham
- Division of Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - J Jon Paul Selvam
- Division of Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Y Venkateswarlu
- Division of Natural Product Chemistry, Indian Institute of Chemical Technology, Hyderabad 500 007, India
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22
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Bayón P, Figueredo M. The gabosine and anhydrogabosine family of secondary metabolites. Chem Rev 2013; 113:4680-707. [PMID: 23597176 DOI: 10.1021/cr300150w] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pau Bayón
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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23
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Tuzi A, Andolfi A, Maddau L, Masi M, Evidente A. Structure and stereochemical assignment of spheropsidone, a phytotoxin from Diplodia cupressi. J STRUCT CHEM+ 2012. [DOI: 10.1134/s0022476612040245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Mehta G, Roy S, Pan SC. Enantioselective syntheses of bioactive epoxyquinone natural products (+)-harveynone and (−)-asperpentyn. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.115] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Meister AC, Nieger M, Bräse S. Synthesis of 4-Hydroxy-5-methyl- and 4-Hydroxy-6-methylcyclohexenones by PdII-Catalyzed Oxidation and Lipase-Catalyzed Hydrolysis. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Fresneda MÁ, Alibés R, Font J, Bayón P, Figueredo M. Stereoselective synthesis and relative configuration assignment of gabosine J. J Org Chem 2012; 77:5030-5. [PMID: 22607108 DOI: 10.1021/jo300456q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first total synthesis of (+)-gabosine J and that of the epimer at C4 of its enantiomer have been accomplished through an enantioselective approach from a common intermediate 1. These syntheses have allowed us to establish the correct relative configuration of the natural metabolite, which was originally misassigned. This work, together with our former syntheses of other gabosines and related compounds, validates enone 1 as a general synthetic precursor for this kind of carbasugars.
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Labora M, Schapiro V, Pandolfi E. Concise chemoenzymatic synthesis of gabosine A, ent-epoformin and ent-epiepoformin. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Shing TK, Chen Y, Ng WL. Carbocyclization of d-glucose: syntheses of gabosine I and streptol. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Kumar V, Das P, Ghosal P, Shaw AK. Syntheses of (−)-gabosine A, (+)-4-epi-gabosine A, (−)-gabosine E, and (+)-4-epi-gabosine E. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.082] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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Clay DR, Rosenberg AG, McIntosh MC. Efficient, scalable asymmetric synthesis of an epoxy quinol via Noyori desymmetrization of a meso diketone. TETRAHEDRON, ASYMMETRY 2011; 22:713-716. [PMID: 21743778 PMCID: PMC3131412 DOI: 10.1016/j.tetasy.2011.04.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Epoxy quinol 1a was prepared on a multi-gram scale by Noyori transfer hydrogenative desymmetrization of the readily available meso epoxy diketone 4. Although the intrinsic enantioselectivity for the desymmetrization was modest (82:18 er at 4% conversion), a highly enantiopure product (99.6:0.4 er) could be obtained in one operation in 44% yield via kinetic resolution of the minor enantiomer with long reaction times (48 h), or in 73% yield by combination with an enzymatic resolution of a 93:7 er mixture.
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Affiliation(s)
- David R. Clay
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Ashley G. Rosenberg
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Matthias C. McIntosh
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
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Toribio G, Marjanet G, Alibés R, de March P, Font J, Bayón P, Figueredo M. Divergent Approach to Gabosines and Anhydrogabosines: Enantioselective Syntheses of (+)-Epiepoformin, (+)-EpoKformin, (+)-Gabosine A, and Gabosines B and F. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001527] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rao JP, Rao BV. A common strategy for the synthesis of (+)-gabosine N, (+)-gabosine O, and some carbapyranoses using a Nozaki–Hiyama–Kishi reaction and RCM. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.05.041] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Redondo MC, Ribagorda M, Carreño MC. Exploring Morita-Baylis-Hillman reactions of p-quinols. Org Lett 2010; 12:568-71. [PMID: 20055444 DOI: 10.1021/ol902763g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Morita-Baylis-Hillman reaction of p-methylquinols with activated aromatic aldehydes has been studied. Depending on the reaction conditions (solvent and additives), three different products were formed. A mono or double Morita-Baylis-Hillman adduct and a fused 1,3-dioxolane could be obtained in good chemical yields. The use of non-nucleophilic bases to promote the reaction suggested an autocatalytic mechanism.
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Affiliation(s)
- María C Redondo
- Departamento de Química Orgánica (Módulo 01), Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Cantoblanco, 28049-Madrid, Spain
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38
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Shing TKM, So KH, Kwok WS. Carbocyclization of carbohydrates: diastereoselective synthesis of (+)-gabosine F, (-)-gabosine O, and (+)-4-epi-gabosine O. Org Lett 2009; 11:5070-3. [PMID: 19803475 DOI: 10.1021/ol902071e] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Exploitation of silica gel/chloramine T mediated intramolecular nitrile oxide-alkene cycloaddition (INOC) of sugar-derived oximes to carbocycles furnished the first synthesis of gabosine F from l-arabinose in 12 steps with 23% overall yield, thereby confirming its absolute configuration. Similarly, efficient syntheses of gabosine O and 4-epi-gabosine O were accomplished from D-mannose in 9 and 11 steps with 41% and 38% overall yields, respectively, involving INOC, regioselective dehydration, and diastereoselective hydrogenation as the key steps.
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese Univeristy of Hong Kong, Shatin, Hong Kong, China.
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39
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Abstract
(+)-Gabosines A (12), D (4), and E (5), which share the same trihydroxycyclohexenone skeleton, were synthesized from enone 11 as the common intermediate. The key building block 11 was accessed by an intramolecular aldol cyclization of a diketone derived from D-glucose (8).
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Affiliation(s)
- Tony K M Shing
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin NT, Hong Kong, China.
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40
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Pinkerton DM, Banwell MG, Willis AC. Chemoenzymatic Access to Versatile Epoxyquinol Synthons. Org Lett 2009; 11:4290-3. [DOI: 10.1021/ol9016657] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David M. Pinkerton
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University, Canberra, ACT 0200, Australia
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41
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Merino E, Melo RPA, Ortega-Guerra M, Ribagorda M, Carreño MC. Stereocontrolled approach to phenyl cyclitols from (SR)-[(p-tolylsulfinyl)methyl]-p-quinol. J Org Chem 2009; 74:2824-31. [PMID: 19239257 DOI: 10.1021/jo900109p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of enantiopure (SR)-[(p-tolylsulfinyl)methyl]-p-quinol with ArAlMe(2) reagents allowed a highly diastereoselective 1,4-addition of the aryl group with an efficient desymmetrization of the prochiral cyclohexadienone moiety. The asymmetric synthesis of phenyl-substituted polyoxygenated cyclohexane derivatives was achieved by combining this reaction with a stereoselective reduction and elimination of the beta-hydroxysulfoxide, after oxidation to sulfone, to recover a carbonyl group, and a stereoselective epoxidation.
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Affiliation(s)
- Estíbaliz Merino
- Departamento de Química Orgánica (C-I), Universidad Autónoma, Cantoblanco, 28049-Madrid, Spain
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Carmen Carreño M, Hernández-Torres G, Ribagorda M, Urbano A. Enantiopure sulfoxides: recent applications in asymmetric synthesis. Chem Commun (Camb) 2009:6129-44. [DOI: 10.1039/b908043k] [Citation(s) in RCA: 223] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Mac DH, Samineni R, Petrignet J, Srihari P, Chandrasekhar S, Yadav JS, Grée R. From vinyl pyranoses to carbasugars by an iron-catalyzed reaction complementary to classical Ferrier carbocyclization. Chem Commun (Camb) 2009:4717-9. [DOI: 10.1039/b907632h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Monrad RN, Fanefjord M, Hansen FG, Jensen NME, Madsen R. Synthesis of Gabosine A and N from Ribose by the Use of Ring-Closing Metathesis. European J Org Chem 2009. [DOI: 10.1002/ejoc.200800983] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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45
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Carreño M, Enríquez Á, García-Cerrada S, Sanz-Cuesta M, Urbano A, Maseras F, Nonell-Canals A. Towards Configurationally Stable [4]Helicenes: Enantioselective Synthesis of 12-Substituted 7,8-Dihydro[4]helicene Quinones. Chemistry 2008; 14:603-20. [DOI: 10.1002/chem.200700762] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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46
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Carreño M, Ortega-Guerra M, Ribagorda M, Sanz-Cuesta M. Synthesis of 4-Aminotropones from [(Sulfinyl or Sulfonyl)methyl]-Substitutedp-Quinamines. Chemistry 2008; 14:621-36. [DOI: 10.1002/chem.200700940] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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